Charge forming device



Feb. 28, 1933. w. H. TEETER CHARGE FORMING DEVICE Filed Sept. 25. 1928 3 Sheets-Sheet l Feb. 28, 1933. w. H. TEETER CHARGE FORMING DEVICE 3 Sheets-Sheet 2 Filed Sept. 25, 1928 w v m Feb. 28, 1933. w. H. TEETER CHARGE FORMING DEVICE Filed Sept. 25, 1928 3 Sheets-Sheet 3 manifold. I A1 singleth'rottle' 64, which I e2 tendsacro-ss all of the primary mixture passagesycontrols the flow therethrough and is provided with grooves66 whi'chregister with said mixture passages; This throttle is operated by means disclosed in the above earlier 1 applications and which forms no part of the present invention? I All of the air-enteringthe carburetorena "ceptthat' entering "through the passage 48 flowsthrough the airhorn'26 controlledby a -ma in air val'vefTO, normally-held against a 7 8 slidably mountedon as tationary "guide air valve is secured] When it is: desired to choke" the carburetor.

to start the. engine, theflange 76'is' adapted toebe-lifte'd'. by me'ans of an armr7 7 "and other connections, as described infthe aboveapplications, until the upper 'end of sleeve 7 8 en-Y gages the valve; tohold itiagainst its seat.

:Sufiicient air, tofca'rry the starting fuel from the nozzles to the engine intaketzports is admitted through thesp assage AS hereinbefore described; I ,1 V The valve admits airto amain airchamber 88 whichcommunicates directly with the 7 primary mixture passages :62 and also with asecondary air passage 90 whichisadapted toconne'ct with the inlet-"of[theimanifold 10* v :7 to supply air to allttheisecondary rmixing 35 chambers. A manually operable throttle-92 secured to a shaft,94= controls the flow of air the same operatinggconnections as is the primary throttle 64, these connections compris ing anoperating arm' 98 connected-to a spindle 100 projectingfrom the primary throttle and connected by a lost motion linkage :102 to anarm 104 secured by screw 106' to the shaftI94 of the air, throttle 92. .The construc .tionof'thelost motion-"linkage is such that the primary throttle, mayxmake a 'predeter- I mined openingmovement independent of the I air throttle afterwhich they move-together.

'These' operating Iconnectio'ns form no part ofthe present invention and aredefscrihed in tail in the earlier applications above-re; .ferred to. e. I

I I :Onopening of either or both oftheIabove described throttle valvesg thej suction in the main jairchamber 88 is increased and additional air admitted to increase the, quantity of mixtnre supplied to theiengine. The opennerh Fuel admitted through aniorifice 116 in the bottonrof *thecvlinder 110-and said orifice isclosedby a check valve 118 on downward motion of the piston 112.111 the usual way; This; dashpot forms as parts of the 7 present invention and lmay be ofany convention. Each comprises an Venturi tub'ex120 provided withari externalrib 1321Whi0h5- when the manifold issecured to the engine blOCkQlS clamped hetweenshoulders 134 and 136cm the manifoldand engine block respectively Each venturi isso positioned with: respect to its associated primary mixture conduit that the point of A greatest 1 suction in said, Venturi tube isimmediately adjacent the outlet end of said primarymixturetcon I .duit. 1 The-tubes increase thevelocity of air flow attheflends of'said conduits, insuring'tat conduits.

all times a relatively highsuction in said I, It will beunderstcodthat associated construction of the device'disclosed hereinis I much the same as that disclosedin'thezearlier this emulsion I to 'thejprimary mixture pasapplications above ireferred to They novel I I construction to whiclithe Zp'resentinvention I is directed comprises 1 the means; for forming an emulsion offfuel- 'and airand conveying vice disclosed shows a preferred form of-this invention, the novel {Structure could her-em; ."bodied'in charge forming devices of different through thepassagea9O and is operated by" V I -It willialso be understood rthat, although no fuel pump or otherl means for enriching I the mixturefor acceleration has been shown herein, ,for the sake; of "simplicity of dis- 7 closure, any wellkknown means for enriching the mixture may be pro'vidcd,' as for instance eitherof'the'forms' of fuel pump shown in the earlier applications above referred to.,

While the form of embodiment offl'the present invention as herein disclosed, con- Isti'tutes a preferred-form; it is to befunderstood that other forms .might'be adopted,--; all comingwithin the scope of the claims which.

construction than that illustrated herein.

follow- I a What is claimed is as follows:

. 1. A charge forming device .for internal combustion engines comprising a secondary 1 mixing chamber an elongated primarypasw sageI- having one iend opening; into; said i secondary mixing chamber, a throttle inesaid i primary mixing passage near theother end Q thereof, means fo rfl'supplying aisuper rich .mixture of fu'el andair to said primary. mix; ing passage.v under allvoperating f conditions andatf a point closef:to' that side of-the throttle which is remote from" saidsecondary' -mixing chamber, means; near the. first men'- v tioned nneans for. admitting i air to-xsaid :pri-' mary mixing passage toidilutesaidsuper- .rich mixture, said primary mixing passage and the said two means being adapted: to

deliver .a primary mixture of properly combustible proportions to said secondary chamber/for all-positions of said throttle from the closed position to a predetermined open position thereof, and means controlledby movement of said throttle for. admitting a-irto said secondary mixing chamber.

2, A charge forming device for internal c ombustion'engines comprising a secondary mixing chamber, a primarymixing passage,

a throttle in said primary mixing passage,

means for supplying a super-rich mixture of fuel and air to sand primary HllXlIlg passage under 'all operating conditions, means v for admitting air to saidprimary 'mixing passage to dilute said super-rich mixture, said primary mixing passage and the said two means being adapted to deliver a primary mixture of properly combustible proportions to said secondary mixing chamber for all positions of said throttle fromthe closed positionto a predetermined open position thereof, and to deliver a super-riclrmixture to said secondary mixing chamber for open; positions of-saidthrottle beyond said pre-;

determined position, and means controlled by movement of said throttle beyond'said predetermined'open position for admitting air to said secondary mixing chamber. 1

- 3, A charge forming device for internal combustion engines comprising, a secondary mixing chamber, a primary mixturepassage,

a throttle in said primary mixture passage, said primary mixture passage being adapted to deliver "-a 1 primary mixture of properly combustible proportions to said: secondary mixing chamber 'atall eng ne speeds below a predetermined" speed, :and'a super-rlch mixture to said secondary mixing chamber-at higherspeeds than said predetermined speed,

"means for-supplying a super-rich mixture of fuel and air to said primary mixture passage at alljspeeds, means for admitting a r'to said last named'passage-t'o dilute said super-rich mixture at all speeds,and means controlled by said throttle'for admitting" air to said secondary mixing chamber at speedsfabove said predeterminedspeed to further dilute the super-rich mixture,

a 4:. A charge formingdevice for internal combustion engines comprising a plurality of mixture passages, affuel reservoir below said mixture passages, an air supply passage extending through'said' fuel reservoir and provided with anenlargement therein, aplu- 1 rality of fuel ets in said enlargement, each of whichxis adapted to supplyfuelfor one of said" mixture passages, andaflpluralitymof Venturi tubes in said enlargement, eachof whichsurroundsone of saidjets. and com-j municateswith one of said mixture passages,

wherebyflow offuel from all of said jets is effected and the resulting mixture conveyed to said mixture assages.v V

*5; A charge orming device for internal combustion engines comprising a plurality of primarymixture passages, a plurality of secondary mixing'chambers intowhich said passages deliver, a fuel reservoir below said mixture passages, an air suply passage extendingthroughsaid reservoir, and provided with an enlargementtherein, a plurality of fuel jets in saidenlargement, each of which is adapted tosupply fuel for one of said mixof primary mixture passages, secondary mixing: chambers into which: said 'primarymixture passages deliver, a fuel reservoir below said mixturepassages an air supply'passage adapted to communicate Withall ofsaid mixture passages, a plurality of fuel jets located in said air supply. passage at substantially the levelrof fuel in reservoir, each of whichis adapted to supply fuel to one of said primaryv mixture passages, means for creating a suction at said ets to efl'ect'a flow of fuel therefrom, and means for supplying I v passages and said secondary mixing chambers.

air to said primary" mixture 7. Acharge forming device for internal combustion engmesjeompnsmg a fuel reservo1r,a plurality of: hor zontal mixture passages above the fuel reservoir, avertical air passage extending through the reservoir, a

plurality of fuel nozzles in said air passage terminatine' substantially at the fuel level mamtamerf inthe reservoir, and a plurality of Venturi tubes surrounding said fuel nozales, each is adapted to communicate with said air passage passages." 18. A charge forming device for internal and with one of said mixture combustion engines comprising a plurality of substantially horizontal mixture passages,

a fuel reservoir below said mixture passages, a substantially vertical air supply passage rality offuelnozzles in theenlargement, each of which is adapted to supply fuel to one of said mixture passages, and a conduit extending from each fuelnozzle to its associated mixing chamber, and having means therein- -.for"increasing the air velocity adjacent the nozzle to. effect a flow of fuel therefrom.

H 9. A charge forming device for internal extendingthrough'said fuel reservoir and providedwith an enlargement therein, a plu-L; e

combustion engines comprising a plurality of substantially horizontal mixture passages,v

chamber and having means therein for -innature v creasing the air velocity adjacent the. nozzle to efiect a flow offuel therefrom; and means for supplying additional air to saidmixture passages under all. operating conditions to* i I nozzle to effect a flow of fuel therefrom, said means being. effective "under all operating,

conditions to form a super rich mixture of fuel and air to be supplied to the primary mixture'passage, and'ineansfor admitting air under all operating conditions to said primary mixture passage to dilute the super rich mixture therein.

In testimony whereof 1 hereto aifix my sig-i WILFORD I 11. TEETER."

dilute the mixture supplied thereto by. said.

conduits. I p c 10. Acharge forming'device' for internal;

combustion engines comprisingasubstantialr V y. horizontal primary mixturepassage'adaptied to deliver a primary mixture of fuel and-Q1 I air to a secondary mixing'chamberya fuel.

reservoir under the mixture passage',;means for mainta ning the fuel level in s'aidreservoir a substantial distance, below the mixture v reservoir and communicating withthe atmos phere, a fuel nozzlein said'con'du'it terminat ing substantially at the fuel level, and means in said conduitfor creating. a suction at said j nozzle to eflfecta fiow-offuel'therefrom, said "combustion engines comprisinga substanmeans being effective under all operating conditions to cause sufiicient flow. of fuel to form a super rich mixture of fuel andair in said conduit. i n n 11. A' charge forming device for internal tially horizontal primary mixture passage adapted to deliver a primary mixture of fuel passage, a conduit'extending downwardly from the mixture passagethroughthe fuel and air to a secondary mixing chamber,a fuel reservoir under the mixturepassage, means for maintaining the fuel levelyinsaid reser voir a substantial distancebelow themixture passage, a conduit extending downwardly from the mixture passage through thev fuel reservoir and communicatingwith the atmos- .phere, a fuel nozzle in said conduit terminating substantially at the fuel'level, andineans in said conduit for c'reatinga suction at said nozzle to effect a flow of fuel therefrom, said means being also operative to convey the'fuel mixture to the primary mixture passage; 7

12: A charge forming device for internal combustionengines comprising a substantial- 1y horizontal primary mixture passage adaptedto delivera prin'i ary mixture of. fuel and air to a secondarymixing chamber, a; fuel reservoir under the mixture passagey'means for maintaining the fuel level in,said reser- 7 'voir a substantial distance below the mixture passage; .a conduit extending ivdownwardlyi Lfrom the mixture passage through the fuelreservoir andcommunicatin Q 'With th'e vat- V v mosphere afuel nozzleinsa conduit 'termi nating substantially at the fuel level, means .insaid conduit forc'reatinga suction at said V 

